MAC7200 datasheet(235/976 Pages) FREESCALE

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A7S Nexus3 Programmers Model

MAC7200 Microcontroller Family Reference Manual, Rev. 2

Freescale Semiconductor

157

NOTE

The WT bits will control Program/Data Trace only if the TM bits within the

Development Control Register (DC) have not already been set to enable

Program Trace.

11.10.3.9 Data Trace Control (DTC)

The Data Trace Control Register controls whether DTM Messages are restricted to reads, writes or both

for a user programmable address range. There are two Data Trace channels controlled by the DTC for the

A7S Nexus3 module.

Table 11-27. WT Field Descriptions

Field

Description

31–29

PTS

Program Trace Start Control

000 Trigger disabled

001 Use ARM7 Watchpoint 0

010 Use ARM7 Watchpoint 1

011 Use Nexus Watchpoint 1

100 Use Nexus Watchpoint 2

101 Use Nexus Watchpoint 3

110 Use Nexus Watchpoint 4

111 Use Nexus Watchpoint 5

28–26

PTE

Program Trace End Control

000 Trigger disabled

001 Use ARM7 Watchpoint 0

010 Use ARM7 Watchpoint 1

011 Use Nexus Watchpoint 1

100 Use Nexus Watchpoint 2

101 Use Nexus Watchpoint 3

110 Use Nexus Watchpoint 4

111 Use Nexus Watchpoint 5

25–23

DTS

Data Trace Start Control

000 Trigger disabled

001 Use ARM7 Watchpoint 0

010 Use ARM7 Watchpoint 1

011 Use Nexus Watchpoint 1

100 Use Nexus Watchpoint 2

101 Use Nexus Watchpoint 3

110 Use Nexus Watchpoint 4

111 Use Nexus Watchpoint 5

22–20

DTE

Data Trace End Control

000 Trigger disabled

001 Use ARM7 Watchpoint 0

010 Use ARM7 Watchpoint 1

011 Use Nexus Watchpoint 1

100 Use Nexus Watchpoint 2

101 Use Nexus Watchpoint 3

110 Use Nexus Watchpoint 4

111 Use Nexus Watchpoint 5

19–0

Reserved for future functionality (read as 0)

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